Milling machine



(No Model.) 2 Sheets-Sheet 1.

j 1. HOLZ. MILLING MACHINE.

110. 554,423. Patented Peb. 11, 1896.

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P.HoLz--l MILLING MACHINE.

No. 554,423. Y Patented Fab. 11,1896.-

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FREDERICK I-IOLZ, OF CINCINNATI, OIIIO, ASSIGNOR TO THE CINCINNATI MILLING MACHINE COMPANY, OF SAME PLACE.

MACHINE.

srncrrrcA'rroN forming prbf Letters Patent No. 554,423, dated February 11, 189e.

Application filed October 11, 1894-.. Serial No.' 525,606. (No model.)

To all whom t may concern:

Be it known that I, FREDERICK I-IQLZ, a citizen of the United States, residing at Cincinnati, in the county of I-Iamilton and State of Ohio, have invented certain new and useful Improvements in Milling-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to that class of milling-machines in which the work carrying table is operated automatically and in either direction by the machine, and it has for its object the improved construction of this class of machines.

The novelty of my invention will be hereinafter set forth and specifically pointed out in the claims.

In the accompanying drawings, Figure l, Sheet l, is a side elevation of a milling-machine embodying my invention. Fig. 2,Sheet 2, is an enlarged plan view of the automatic feed mechanism, partly in section, on the dotted line m .fr of Fig. 3. Fig. 3, Sheet 2, is a front elevat-ion in section on the dotted line y y of Fig. 2 and including part of the workcarrying-table feed-screw. Fig. 4, Sheet 2, is an enlarged front elevation, partly in section, of the saddle and its clamping mechanism.

The same letters of reference are used to indicate identical parts in all the iigures.

The machine proper maybe of the usual or any suitable construction and it is only necessary in describing it to say that A is the upright or column; B, the live-spindle j ournaled therein; C, the cone-pulley for driving the live-spindle; D, the knee dovetailed to the front of the column and given vertical movement and adjustment by the usual screw E l operated by the handle-shaft F.

' zontal movement at right angles to that of the saddle by the usual feed-screw shaft J, operated at one end by a hand-wheel in the usual manner and at another point automatically by the machine by the following novel mechanism forming part of my present invention On the under side of a projecting part of the saddle and by the side of the knee is secured a housing K, Fig. l, in the lower part of which is journaled at right anglesto the side of the knee a shaft L, having fast thereon between the walls of the housing (see Fig. 3) a bevel-gear M with which a small gear N, fast on a stub-shaft O, drivenin any suitable manner by the machine, meshes. The mechanism for driving the shaft O,in this instance, is represented to be substantially that of my prior application, Serial No. 524,6(214, filed October l, 1894:, and which may be briefly described as follows: A shaft P, feathered and telescopicallylitting in a tubular shaft Q, is connected by a gimbal-joint to the shaft O, while the shaft Q is connected by a similar joint t-o a shaft R j ournaled in a bracket S, secured to the column, and carrying a cone-pulley T belted to a cone-pulley U, Fig. l, driven by the livespindle through a series of intermeshing gears controlled by a hand-lever V in connection with an index for varying the rate of speed of the feed or stopping it altogether, as described in my prior application above referred to. Any other mechanism, however, driven by the machine, may be employed for communicating motion to the shaft O.

J ust above the shaft L and parallel thereto is journaled a shaft a, on the outer end of which is made fast a gear b meshing with a small pinion c on the outer end of the shaft L. The inner side of the gear b has a proj ecting hub d extending within the space between the walls of the housing and having its inner end formed with clutch-teeth to engage clutch-teeth on the side of a small pinion e, journaled loosely on the shaft a.

The pinion e has a hub with a circumferential groove engaged by the fork of a cranklever fpivoted, as .at g, to the housing and connected by a pivoted link h to a crank-pin t', Fig. 2, on the lower end of a vertical shaft j j ournaled in the saddle and whose upper end is provided with a handpiece 7c carrying a pin Zin the path of a wiper-block m, adj ustably secured to the front face of the work- IOO carrying table by means of a bolt confined in a T-headed slot extending the length of the work-carrying table, the construction being such that the clutch between the gears e and h may be engaged or disengaged by hand from the handpiece 71: or may be disengaged automatically by the wiper-block m striking the pin Z and thereby turning the handpiece to effect the disengagement of the clutch. The arrangement of the parts is such that when the clutch is engaged the center of the shaft j, pin i and the pivot connecting the link h to the lever f are in a straight line to form a deadlock to prevent the accidental disengagement of the clutch.

J ournaled upon the hub d of the gear i) is a shifter-lever n having journaled thereon two intermeshing gears o j), (see Fig 1,) the former of which is in constant mesh with the pinion c, and either of which by swinging the lever n vertically can be madeto engage with a pinion q feathered on the screw-shaft J of the Work-carrying table. A spring hand-len ver r pivoted to the hand-lever n actuates a locking-bolt S engaging perforations in the housing K to hold the lever n in its adjusted positions. A

It will be seen from the foregoing description that all of the driving mechanism for the screw-shaft J is carried by and travels with the saddle and that the screw-shaft may be disconnected from said driving mechanism by turning the handpiece 7; and disengaging the clutch either by hand alone or automatically by the wiper-block m on the work-carrying table; also that the direction of revo* lution ofthe screw-shaft J can be reversed at will to feed the workncarrying table in either direction by shifting the lever n to cause either the gear 0 or the gear p to engage with the pinion q.

The remaining feature of my invention (illustrated in Fig. et) consists in providing a hand-rod or rock-shaft s confined in a recess in the saddle and provided with an operatinghandle 1f, which lengages with a threaded link u pivoted to a knuckle-piece c in a recess behind the saddle-gib w and having a fulcrum, as at a', so that by turning the handle t and rocking the shaft s it is screwed into the link et and pulls upon the knuckle-piece t* in such manner as to cause it to be forced against the gib and to clamp the latter and the saddle to the knee. Turning the handle in the opposite direction the gib is unclamped and the saddle can then be adjusted upon the knee and can be reclamped in its adjusted position.

The purpose of this mechanism is to lock the saddle to the knee and prevent its accidental movement and disengagement while the machine is at work.

I-Iaving thus fully described my invention, I claim-q l. In a 1nilling-machi11e, the combination with the saddle, and work-carrying table operated by a screw-shaft, of a driving-gear, as b, carried by the saddle, two intermeshing gears carried by the saddle and driven by the gear a pinion feathered on the said screwshaft, a pivoted shifter for the two intermeshing gears, whereby either may be made to engage the pinion on the screwshaft, and a clutch interposed between the intermeshing gears and gear b, whereby the former may be connected and disconnected at will from the gear b, substantially as described.

2. In a milling-machine, the combination with the saddle, and work-,carrying table op erated by a screw-shaft, of a driving-gear, as l) carried by the saddle, two intermeshing gears carried by the saddle and driven by the gear b, a pinion feathered on said screw-shaft, a pivoted shifter for the two intermeshing gears, whereby either maybe made to engage the pinion on the screw-shaft, a clutch interposed between the intermeshing gears and gear b, whereby the former may bc connected and disconnected at will from the gear Z), and automatic means controlled by the movement of the work-carrying table, to disconnect said clutch at any predetermined point, substantially as described.

3. In a milling-machine, the combination with a supporting-knee, of a saddle mounted thereon, a gib to lock said saddle to the knee, aclamping-lever fulcrumed between said saddle and gib, and means for operating said clamping-lever so as to force said gib into locking position and secure said saddle at any desired point on said supporting-knee, substantially as described.

4. In a milling-machine, the combination of the work-carrying table and its screwV shaft J, the gear q feathered thereon, the saddle and housing K carried thereby, the pivoted shifter 'nv having the intermeshing gears o, p j ournaled thereon, the gear @with one part of a clutch and meshing with gear o, a shifter for gear e, gear h carrying the other part of the clutch, pinion c meshing with gear b intermeshing bevel-gears M and N, and driving mechanism for the latter gear, substantially as and for the purpose specified.

5. In a milling-machine, the combination with the saddle, knee and interposed gib, of the rock-shaft 3, link u, and knuckle-piece fu, substantially as and for the purpose specified.

FREDERICK HOLZ. Witnesses:

J. THOMSON CRoss, CHAs. M. PEoK.

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